Starting wrench



Dec- 13, 1 B. F. RANDRUP STARTING WRENCH Filed 001;. 27, 1947 VINVENTOR.

Bekjmin Panarup Uu e M W m Patented Dec. 13, 1949 UNITED STAT Es QF C'E-STARTING WRENCH Bcnjamin E2, Itandrup,.hortland flggegi ApplicationQctober27, 1947;; SerialNo. 782,338

1' Claims. (01. 81-.. 7r):1

My present invention comprises a starting wrench havingpa-rticularutility forstarting bolts into holes in relatively inaccessiblelocaliticSrsuch;

beneath the drainpanswof certain 11104316152 of automobiles.

The principal object of my present invention is to provide a startingwrench which is rugged in construction, which is made of relativelyinexpensive and easily formed parts, and which provides a high degree ofadaptability to various situations.

The objects and advantages of my present invention will be more readilyunderstood by reference to the following specification taken inconnection with the accompanying drawing, wherein like numerals refer tolike parts throughout, while the features of novelty will be moredistinctly set forth in the appended claim.

In the drawings Fig. 1 is a plan view of a preferred form of theinvention;

Fi 2 is a side view of the form illustrated in Fig. 1;

Fig. 3 is a plan view of a modified form of the invention;

Fig. 4 is a side view of the form illustrated in Fig. 3; and

Fig. 5 is a side view of a portion of another modified form of theinvention.

Referring to Figs. 1 and 2, the invention comprises a wide, thin bladeIII beneath one end of which is rotatably mounted a crank disc I Ihaving portions extending beyond the edges of the blade and preferablyhaving an irregular periphery so that it may be rotated between greasyfingers. A second thin, rigid blade I2 is pivotally connected to thelower surface of the crank disc II at a point offset from the center ofrotation thereof and on the opposite side of the disc from the firstblade Ill. mounted upon the upper surface of the opposite end of bladeII], the socket preferably comprising a plurality of spaced, resilientfingers I5 adapted to grip the head of a bolt as illustrated in Fig. 2,the fingers being re-entrantly formed at their outer ends so as topermit engagement of various sizes of bolt heads and to permit the boltto assume various angular positions with respect to the plane of theblades. The socket I4 is rotatably connected to a thin crank I6 mountedbeneath the end of blade Ill and having its free nd connected to theunderlying end of blade I2. The intermediate portions of the blades I Band I2 are connected together by a. slidable connection permittinglongitudinal movement of one A socket I4 is rotatably 2 withrespecti tothe other; such connection pref-- erably comprising a pin H extendingupwardfrom blade I2 through a longitudinal slot I8 in' blade in: andhaving a large head I9- overlying; blade H1 Rotation of di'se II in aclockwise direction by the fingers of one hand while the blade I0 isgripped between the fingers of the opposite hand causes counterclockwiserotation of socket I4, and vice versa. Blade I0 is preferably wider thanblade I2 and the crank throw of blade I2 is preferably such that aportion of blade III adjacent disc I I may be firmly gripped to maintainthe tool in operating position.

In Figs. 3 and 4 the same principles are employed in a tool wherein thesecond rigid blade is connected tothe socket through the intermediary ofa third rigid blade operating to cause the socket to rotate in the samedirection as the crank disc. In this form a first blade 20 has a crankdisc 2I rotatably mounted at one end thereof and a socket 22, similar tothat previously described, mounted on the opposite surface at the otherend thereof. A second blade 23 is connected to the disc 2I at an offsetand is provided with a pin 24 at an intermediate point extending througha longitudinal slot 25 in blade 26 and having an enlarged head 26. Thefree end of blade 23 is connected to a third blade 21 having anintermediate point connected to blade 20 by a pin 28 extending through alongitudinal slot 29 and having a large head 30. The free end of blade21 is connected to a crank 3| fastened to the socket 22. As seen in sideelevation in Fig. 4 the blade 23 is preferably bent between pin 24 andthe disc 2I so as to provide for frictionless clearance of the disc 2 I.

In Fig. 5 a modification is disclosed wherein a first blade 40, to whicha crank disc (not shown) is rotatably attached as in the othermodifications, supports a second blade II which may be similar to bladeI2 of the first modification or blade 21 of the second modfication. Theblade II is pivotally attached to a crank 42 from which a shaft extendsthrough blade and is fastened to a pinion 43. Pinion 43 meshes with agear 44 fixed to a socket 45 similar to those previously described. Theuse of such reduction gearing may be desirable to provide greaterstarting torque than would be provided by the other modifications.

It is to be appreciated that the blades may be thicker in proportion totheir width, or wider than those disclosed. and that a thicker crankdisc may be employed, particularly if one of the blades is offset as isthe blade 23. Various other modifications in detail and arrangement willreadily occur to those skilled in the art. All such modifications ascome within the true spirit and scope of the appended claim areconsidered to be a part of my invention.

I claim:

A wrench comprising a first blade, a crank disc rotatably connected atits center to one end of said blade and lying in a plane parallel to theplane thereof, said crank disc having portions extending beyond theedges of said blade to permit digital rotation thereof, a socketrotatably mounted at the opposite end of said blade and upon theopposite surface thereof from said crank disc, a crank operativelyconnected to said socket and lying beneath said blade in a planeparallelto the plane thereof, and means operatively connecting said crank discto said crank whereby rotation of said crank disc produces rotation ofsaid socket comprising a second blade lying in a plane parallel to theplane of said first blade and closely adjacent thereto, said secondblade having one end pivotally attached to said crank disc at a pointoffset from the center of rotation thereof on the opposite side thereoffrom said 4 first blade and its other end pivotally attached to saidcrank, and means slidably connecting intermediate points of said bladescomprising a pin fixed to one blade and a longitudinal slot in the otherblade through which said pin extends.

BENJAMIN F. RANDRUP.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

